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## Main Question or Discussion Point

Can someone help me clear up where this formula originates and if it is correct?

Has to do with a low speed in line bullet vehicle front end impacting the rear of a stopped target vehicle.

S1' (post impact) = (1 + e) X ((S2 - S1) / (1 + W1 / W2)) + S1

S = Speed in mph

W = Weight of vehicles 1 (bullet) and 2 (target)

e = restitution (a decimal value from 0 to 1)

Has to do with a low speed in line bullet vehicle front end impacting the rear of a stopped target vehicle.

S1' (post impact) = (1 + e) X ((S2 - S1) / (1 + W1 / W2)) + S1

S = Speed in mph

W = Weight of vehicles 1 (bullet) and 2 (target)

e = restitution (a decimal value from 0 to 1)